Originally Posted by tommyvdv
"Sos de Los Reyes Catolicos" looks nice.
I think i'm starting to get it. The northern spur you're talking about is a track that starts less than one km to the west of Carcastillo from the Na-5500 direction SW for the first 6km shortly after that entering the park and leading to the loop.
nice shots :)
Yes and no! The entrance is off the NA 128 between Carcastillo and Sádaba roughly half way and on the Navarre side of the frontier.
It's a bit notorious for being diffucult to find - I got lost last time turning off the road too soon
But there's a sign on the main road. I wrote the trip up on my blog
last year and put the correct route on the Googlemap!